Printing or selecting telegraphs



Jul '12 1927.

y I c. L. KRUM ET AL PRINTING OR SELECTING TELEGRAPHS Original FiledDec. 23. 19.19

9 Sheets-Sheet 1 :iiiiil I W in July 12, 1927.

'c. KRUM ET AL PRINTING OR SELECTING TELEGRAPHS 9 Sheets-Sheet 2 lowOriginal Filed Dec. 23, 1919 3&1 12 1927.

y c. L. KRUM ET AL PRINTING OR SELECTING TELEGRAPH-'5 Original FiledDec. 23. 1919 Sheets-sheaf. 4

Jul 12,1927. 4 1,635,486

v c. L. KRUM ET AL PRINTING OR SELECTING TELEGRAPHS Original Filed Dec.23, 1919 9 sh t -Sheet 5 '80 IIIIIHIIII c. L. KRUM ET AL PRINTING 0RSELECTING TELEGRAPHS Original Filed Dem- 1919 9 Sheets-Sheet 7 July 12,1927. ,486

C. L. KRUM ET AL PRINTING OR. SELECTING TELEGRAPHS Original Filed Dec25. 1919 9 s t -shut 8 July 12, 1927.

'c. L. KRUM ET AL PRINTING OR SELECTING TELEGRAPHS Original Filed Dec. 29 9 Sheets-Sheet 9 inmat s July 12,1927.

,UNITED STATES- PATENT orrlca CHARLES L. K RUM AND HOWARD L. KBUM, OFCHICAGO, ILLTNOIS, ASSIGNORB, BY M15531! ASSIGNMENTS, TOMOBKBUH-KLEINSCHMIDT CORPORATION, 01 CHICAGO,

ILnINois, A CORPORATION or DELAWARE.

PRINTING on SELECTING 'rELnenArns.

Application filed December 23, 1919, Serial No. 346,848. Renewed October30, 1826.

To this end the invention provides improved transmitting and recelvingapparatus having sets of permutation members or selectors correspondingin number to'the selecting units of a definite interval code, and inwhich electric contacts and magnets are reduced to a minimum theoperations, for

the most part, being effected mechanically rather than electrically. Afurther object of the invention is to provide improved apparatus inwhich the receiver is kept in proper timed relation with the signals byinitiating the operation of the rotary receiver shaft in response to astarting unit or interval which precedes the selecting units orintervals of each signal.

The invention consists in the features of improvement hereinafter setforth, illustrated in preferred form and arrangement in the accompanyingdrawings, and more particularly pointed out in the appended claims.

In the drawings- Figure 1 is a plan view with the brackets which carrythe receiver or printer shown in horizontal section;

- Fig. 2 is a detail section on the line 22 of Fig. 1;

Fig. 3 is a vertical section on line 3-3 of Fig. 1 with the motor brokenaway and illustrating the transmitter;

Fig. 4 is a detail section on the lines 4-4 of Figs. 1 and 6;

Fig. 5 is a section on the lines 5-5 of Figs. 1 and 6;

Figs. 6 and 7 are detailsections on the lines'66 and 7-7, respectivel ofFig.1; Fig. 8 is a rear elevation of t e apparatus with the base brokenaway;

Fig. 9 is a front elevation of the receiver or printer of the apparatus;

Fig. 10 is a vertical section on the-line 1010 of Figs. 11 and 12 withthe parts shown shifted from normal or zero posi tion;

Fig. 11 is a side elevation of the receiver or printer with thecontrolling clutch shown in vertical section;

' Fig. 12 is a vertical front to rear section of the receiver with partsin the position shown in Fig. 10;

Fig. 13 is a vertical section on the line 1313 of Fig. 11; i

Fig. 14 is a detail section on the line 14- -14 of Fig. 12;

Fig. 15 is a detail elevation of the trip mechanism for the receiverclutch with parts shown in shifted position;

Fig. 16 is a development of the cam which controls the operation of theselector-operating shuttle;

Figs. 17 to 20, inclusive, are fragmentary views illustratingmodifications of the receiver selecting mechanism; 7

Figs. 21, 22 and 23 are diagramsof different circuits in which theimproved system and apparatus are applicable.

The transmitter and receiver of the improved apparatus are both mountedupon a common base 1 and are operated by a common motor 2. The operationof the receiver is controlled by a magnet 3 and, in the preferred formshown the operation of the transmitter is controlled by akeyboard. Asmall electric motor 2 is preferably employed and, for convenience inassembling, is mounted on a base 4 removably fixed to a plate 5 that isdetachably mounted upon the upper face of the base 1. The motor shaft 1sprovided at its inner end with a fly wheel Gland its outer end isconnected by a pair of beveled ears 7 to a fly ball governor 8.

The latter 1s connected to a movable conable contact, the governormaintains the speed of the motor at the desired uniform 'rate. Thespring 10 is connectedto an adjusting screw 12 for regulating itstension 1 and by adjusting this screw-and the contact 11 the desiredrate of speed for the motor can be obtained.

The base 1 is a hollow casting and has an extension 13 at its lowerfront portion. The

transmitter keyboard comprises finger keysbase extension and engages thedownwardlyand U-springs 25 normally uphold the key front portion of thebase, and with the bails engaging the fingers 21. These springs are 14and a s ace bar15. Thekeys are car ried upon t e upturned forward endsof a set of levers 16, which are arranged within the upper forward en sextending outwardly-through an opening in the base and over the baseextension 13. Frontand rear. comb bars 17 and 18 are provided forguiding the key levers and the latter-are connected to the rear comb barby a--'common-pivot rod. 19.

The space bar is mounted on a bail 20- that is pivoted on theupper faceof the offset forward end of one of the key levers.

The characters are represented bypermutations of two different lineconditions.ex-. tending through a definite number of time intervals orunits. Preferably a five interval or five-unit signal code is employedand the signals are represented by permutations either of current and nocurrentor DIE-POSI- tive and rtegativ e impulsesextending through. thefive tlme intervals or units of each signal.

To selectively determine the signals to be transmitted, the key leversare provided with depending fingers 21 which variably operate a set offive bars or bails 22 that extend transversely below the levers. 'Anadditional starting bar or bail 23 is provided andis uniformly operatedby all of the key levers. These bails are-pivoted on comb blocks 24fixed in position at the sides of the base 1 levers and bails with thekey levers engaging a transverse stop portion 26 at the upperprovided-with hooks at their upper ends which engage the key levers andthe arms of the bails, and the'lower downturned ends of the springsengage openings in a fixed transverse bar 27. The. extent of depressionof the key levers and bails is limited by a stop 28 fixed to the bar 27and projecting forwardly beneath the bails.

The bails 22 are provided at their right-- hand ends with arms 29 thatproject upwardly through an opening in the base 1 and are pivoted to therear ends of a set of five selecting members or fingers 30. Theselecting fingers extend forwardly through guiding notches formed in theupper portion of a common transverse bar 31. Bar 31 preferably formspart of the bail 32, which is mountedon a pivot pin or shaft 33. Thelatter is mounted in rearwardly projecting arms or lugs 34 formed uponan upright bracket 35 'that isfixed to the base 1. An

upwardly extending arm 36 on the bail carries an insulated contact 37that is arranged to engage an insulated adjustable contact 38 on theupper end of the bracket 35. These contacts form a transmitter switchand are preferably normally held in engagement'by rtion of the base with.their,

a spring 39 which extends between the lower portion of. the bracket andthe depending vided with U-shaped forward ends which pivotally engagethe pin or shaft 33 and their rear ends extend through the guidingnotches of the bar 31 and rest upon the forward ends of the controllingfingers 30. At their rear ends the. switch shifters are provided withbeveled shoulders 41 on their lower edges and with raised lugs 42 ontheir upper edges, and these shoulders and lugs are arranged to beengaged respectively by the beveled forward ends of the selectingfingers-30 and by-a set of five cams 43 which are arranged in a helicalseries on a transmitter actuating shaft 44.

Shaft 44 is journaled in suitable hearings on the bracket parts 34 andis driven from the motdr 2'through the medium of suitable connectionscontrolled by a clutch. In the arrangement shown (see Figs. 1, 2 and 7),the clutch is mounted on a short horizontal shaft 45 which extends fromfront to rear of the machine and is journaled in two-brackiets 46 and 47mounted on the base plate 5.

A worm wheel 48 is mounted on the rear end of the clutch shaft andengages a worm 48 on the shaft 49 that is continuously driven,

when the machine is in operation, by the motor 2. The forward end of theshaft 45 is connected by a pair of beveled gears 50 of equal size to thetransmitter shaft 44, or preferably, as shown, to an intermediate shaft51, which is journaled in the rearwardly projecting lug on the bracket47 and in a bracket 52 on the base plate 5. The intermediate shaft 51 isin line with the transmitter actuating shaft 44 and is connected theretoby adetachable coupling which preferably comprises two disks, 53 and 54,adjustably fixed by set screws to the respective shafts, and one ofwhich is provided with an eccentric pin 55 engaging a notch in the otherdisk.

The worm shaft 49 is-journaled in lugs on bracket 46 in line with themotor shaft and is preferably connected thereto by a similar detachablecoupling comprising two'disks56. The transmitter clutch comprisesdriving and driven members 57 and 58 havlng conical working faces (seeFig. 7). The driving-clutch .member 57 is in the form of a metal cup andis fixed to the hub of the worm wheel 48. The worm wheel and drivingmember are loose on the shaft 45 and a yoke 59, fixed; to the bracket46, engages a groove in the hub of the worm wheel and holds 'it and thedriving clutch member against axial movement. The driven clutch member58 ispreferably formed of wood and is fixed to a flanged sleeve 60 thatis pinned to the clutch shaft 45. This shaft can shift in axialdirection to a slight extent through its bearings '61 and 62 andthroughithe hub of the gear 50 thereon: --The forward end of the shaftis squared and engages acorresponding bore in the hub of the -gear 50 todrive the latter. This axial 1 movement of the shaft 45 serves to engageand disengage the clutch members. The driven clutch member 58 isprovided on its outer face with a cone 63 which is arranged 'to engagethe internal face of an annular brake 64 that is carried on the bracket47 L by. means of two pairs of screw pins 65 and 66. The screws 65extend loosely through Y openings .in the bracket and are adjustathreaded into .the body of the brake 64. The

1 screws 66 are fixed to the bracket and the rear ends thereof engageguiding openings in the brake (see Fig. 1). Springs 67 coiled aboutthescrew pins 66 yieldingly hold the brake in position with the heads onthe outer ends of the screw engaging the outer face of the bracket 47.By means of the screws 65 the position of the brake and the tension ofthe springs 67 can be ad- ;A heavy spring 68 coiled aboutthe forr, wardend of the clutch shaft 45 extends between the flanged bearing 62' andthe loose tends to shiftthe clutch shaft rearwardly' and move the drivenclutch member 58 therethe washer and the sleeve. This spring on intooperative engagement with the driving member 57. Inthe normal or zeroposition, however, the shaft is held, by a trip arm or lever 70,-initsforward position -70 is pivoted at its upper-en tri against the tensionof the s ring 68 and with the cone 63 of the driven c utch member en'-arm or lever in .a yoke 71 and its lower end engages a guiding yokegaging the brake 64. The trip 72, both of the yokes being fixed to andprov 4a jecting rea'rwardlyfrom' the bracket 46. A roller 7 3,journaledwithin an opening in the lever, engages the'rear face of a camdis 74 that is held by a set screw upon the f rear end of the clutchshaft 45 and whichis provided with an eccentric lug 75 arranged toco-operate'with the roller 73. A locking latch 76 is arrangz'edto engagethe lower end of the trip arm 0. This latch is mounted on the horizontalrock shaft 77. The latter is 'onrnaled in suitable bearing lugs on thease plate5 and is provided at its left-hand end with an arm 78 whichextends down-. wardly'through an o ening in the base and is connected bya lin an starting baror bail 23.

79.to an arm"80 that depends from the left hand pqrtion. of the I.f-t-llnthe; normal or. zero fposition of the "transmitter the latch 76engages the lower J end-*of the trip arm 70 and the roller'73 on esthelatter engages the cam lug 75 to thereby hold the shaft 45 and clutchmember 58 "ithereon forward with the spring 68 ,com-

:pressed and the cone 63 engaging the brake 64. When any transmitter key1s actuated, the starting bar or bail 23 is depressed and latch 76 drawndown to release the trip arm. Spring 68 then serves to quickly engagethe clutch members and the transmitter actuat-. ing shaft 44 is drivenin the direction-indicated by the arrows in Figs. 3-.and 4. 'As soon asthe cam lug 75 clears the roller 73 a light spring 81 (see Fig. 7) drawsthe trip arm forward so that it is re-engaged by the latch 76 as soon asthe shifted key is restored to normal. The shifted key 'will usually berestored to normal before the shafts .44 and 45 complete a singlerevolution. Then, since the trip arm is locked by the .latch 76, theengagement of the cam lug 75 with the roller 73 will shift the shaft 45forwardly and move the clutch member 58 thereon out of engagement withthe driving member 57 and into engagement with the brake 64,; so thatthe shafts 44 and 45 are arrested with the flat rear end of the cam lug75 engaging the roller. This disengagement of the clutch is aided by the.momentum of the moving parts and thepre ferred clutch and brakeconstruction set forth acts efliciently to effect the quick startingfrom and stopping in zero position of the transmitter actuatlng shaft.

As shaft 44 rotates the cams 43 thereon move in succession over the rearends of the corresponding switch shifters 40. The lugs 42 on the latterare, however, normally out of the path of movement of the cams'43 but,when a key is depressed, one or more of the selecting or controllingfingers 30 are moved forward and lift the rear ends of'the correspondingswitch shifters so that the lugs 42 thereon are engaged by therespective cams 43 as shaft 44 rotates, and this i operation of the camlugs will depress the rear ends of the switch shifters, the forward endsof the selecting or controlling fingers, and the common transverse bar31 of the bail 32, to thereby open the transmitter during the initialportion of each revolution of shaft 44 'to shift the transmitter con---tact 37.

The cams 43\ and'82 are preferably formed 7 upon separate disks held inplacev on the shaft by spacing washers 84 and a nut'85, I

to thereby form in effect a single cylindrical cam member or support thesurface of which is divided into seven equal spaces or units. The cams82 and 43 extend in succession through six of these spaces, leaving onel space unoccupied. The vacant'space or gap the lugs 42 of the switchshifters and the lug '83 on the bar 31. At each revolution of the shaftcam 82, as stated, engages the lug 83 to. impart an initial or startingimtransmitter shaft.

pulse to the line. Cams 43 then pass in succession over the rear ends ofthe switch shifters 40 and, during the interval that each cam passesover the lug 42 of they corresponding switch shifter, the transmitterswitch contacts are either opened or closed in accordance asto whetheror not the rear end of the switch shifter has been raised 'by thecorresponding controlling finger 30.

A starting pulse followed by a permutation of two different lineconditions, and representing a character signal, is thus imparted to theline at each revolution of the As shown, the cams 43 and 82 are providedwith concentric outer edges and beveled end portions, and the extremebeveled ends of adjacent cams terminate in alignment, as most clearlyshown in- F ig. 4. The lugs 83 and 42, which co-operate with the cams,are correspondingly beveled and the arrangement is such that thestartingpulse or interval and the five intervals or pulses of theselective signalcode are .of uniform length. Also, with thisarrangement, the pulses or line conditions follow each other with nogaps or spacing intervals between them.

Means are provided for locking the shifted keys and holding theother'keys against operation. For this purpose a. lock bar 86 'extendstransversely below the key levers 16 and is provided with a beveled rearedge arranged -to co-operate with beveled lugs 87 formed upon thefingers 21 of the key levers. The lock bar is attached to'the lower endsof two rock arms 88 which extend upwardly through openings in the base1, one being pivoted to a lug on the bracket 35 and the other ,to abracket 89 on. the base. The right-hand arm 88 is provided with anupwardly and rearwardly inclined extension and carries a roller 90arranged to engage the periphery of the disk 53. A spring 91, connectedto the right-hand arm 88, holds the roller in engagement with'the disk53 and the latter forms a cam for operating the lock bar. This disk iscircular through the greater portion of its periphery, but is providedwith a recess which is engaged by the roller 90 in the zero position ofthe transmitter, so that the lock bar 86 is held out of the path ofmovement of the lugs 87. As soon as the key is" depressed, however, thecani53 shifts the lock bar rearwardly and co-operates with the lugs 87to hold the shifted key "leverin actuated position and selections. massis of such length that the keys and the other key levers against.movement.

Preferably the cam 53 and lock-bar-86 are arranged to co-operate withthe beveled'lug 87 of the selected key to complete its s'hift.

Slightly in advance of the completion of 70 each revolution of thetransmitter actuating shaft 44 the roller drops into the recess. of thecam 53 and the shifted key and parts controlled thereby arerestored'tonormal in readiness forthe transmission of the suc- -75 but thisnecessitates the use of some means for storing the last or the last twoimpulse In the form shown, the cam. re-

signal selecting bails or bars are released and restored to normalduring the transmission of the fourth pulse of each signal, and means,most clearly shown in Fig. 5, are provided in connection with thefifth'- impulse controlling finger for permitting the operation of a keyduring the transmission of the fifth pulse. p

The arm 29 of the fifth bail is cut olf and is provided with an upwardlyextending spring arm 92 to the upper end of which the correspondingcontrolling finger 30- is pivoted. The latter extends rearwardly-of itspivot and alight spring 93 extends between its rear end and the arm 29.The controlling finger 30 is provided near, its forward end and on itslower edge with a short lug 94, which normally lies in rear of the bar31. The fifth impulse cam 43, as shown,

is providedwith an extension 95 of the same length as the other cams butof less height and arranged in line with the fourth impulse cam. When akey which selects the fifth bar or bail 23 is depressed, the projection94 on the corresponding controlling finger 30 will strike against thebar 31, so that the controller cannot be shifted to lift thecorresponding switch shifter and the spring arm 92 will be flexed asshown in full lines in Fig; 5. The depression of the key will. also, ofcourse, close the transmitter clutch and start the rotation of the shaft44 and cam 53 thereon, and the latter will shift the locking bar andhold the selected key down, as also indicated in Fig. 5. Then, when thebar 31 is depressed by the engagement of the starting cam 82 with thelug 83, a the spring 93 can then slightly lift the forward end of thecontroller 30'.so that the flexed spring arm 92 will shift it forward tothe position indicated in dotted lines in Fig.

5, and thereby raise the fifth impulse switch shifter 40. In thisposition the lug 94 will be in front of the bar 31 and, at the proper 3time, the fifth impulse cam 43 will engage. o

' transmission of the character signahand the I and actuate the fifthimpulse switch shifter.

'. The locking 'bar releases theshifted key as soon as the fourthimpulse has been transmitted, but the fifth impulse controller 30 isprevented from moving back to normal position.in case the bar 31 isdepressed by the fourth impulse camby the extension 95 of the fifthimpulse'cam. This extension holds the controller 30 sufficientlydownward to prevent its projection 94 from clearing the bar 31.- Asspring 93 is much lighter than the spring 39, ofthe rocking bail 32, itsaction cannot open the contact. If the fifth bar or bail 23 has beenselected for a letter, the controlling finger 30 remains in its shiftedleft-hand position at the completion of the sprin arm 92 will be flexedin the opposite direction from that indicated in Fig. 5. -If

the fifth bar 'or bail is selected for the succeeding character, thecontrolling finger 30' remains in shifted position; but, if it is notselected, it will slip back over the bar 31 when the starting cam 82moves the bar downwardly. If desired, similar storing means could beassociated with the fourth impulse selecting devices. ,This arrangementfor storing the fifth pulse selections of the code signals permits ofthe rapid operation, of the transmitter in sending a message, and,indeed, without arresting the transmitter shaft, since the keys can beoperated so rapidly that before the transmitter and clutch shafts 44 and45 have completed a revolution .the latch 76 will have been shifted toreleased position and the trip arm 70 will not act to open "the clutch.Nevertheless, as the cams 82 and 43 and the blank these brackets areconnected by horizontal portion of the cam member on the shaft 44 passin succession over the lug 83 and the lugs 42 of the switch shifters,the code Sigrest the transmitter in zero position, ready,

for further operation.

The parts of the receiver selecting mechanism and printer are mounted onthe rear bracket 46 and a front bracket 96 secured to the base plate 5.The upper portions of brace bars 97. The receiver has a main shaft 98.which is journaled at its forward end in V a bearing 99 on the upperportion of the bracket 96, and its rear end extends throughan opening inthe upper portion of'hracket 46 and is journaled in a bearing 100carried bv a U-shaped support 101 fixed to the'rear face'of the bracket.Shaft 98 is actuated from the continuously operating motor-' drivenshaft 49 through a clutch onashaft 1 102 parallel to shaft 98 andjournaled in f bearings 103 and 104 mounted, respectively,

in the rear bracket and 105' on the base plate.

The receiver clutch is similar in'construc-"i; tion to the transmitterclutch and'co'mprises a driven member 106 pinned to shaft .102 andhaving external and internal cone sur-- faces which co-operate,respectively, with [75. cup-shaped driving member 107 andan annularbrake 108. The driven member 106 is. formed of metal and is providedwith any integral gear 109 that meshes with a gear 110 that is of thesame size-and is fixed to a collar 111 on the main shaft 98. The drivingclutch member 107 is provided with a wooden liner 112 for engagementwith the external v surface of the driven unember1106. The brake 108 isprovided with a wooden cone 113 adapted to en age the internal surfaceof the driven mem er. A clutch trip lever 114 is pivoted in a lower yoke115 and is 1 guided in the upper yoke 116, which yokes are mounted onthe bracket 46 and project rearward therefrom. The trip is held innormal position by a toggle latch controlled by the armature of the maet 3. In other respects the arrangement 0 the receiver clutch and brakeand the parts connected thereto are similar to the corresponding partsof the transmitter clutch and brakeand are core respondingly numbered.It should be noted, however, that the worm gearing between the drivingshaft 49 and the two clutch shafts is such that the receiver shaft 98 isdriven at a speed slightly greater than that at which the transmittershaft 44 is driven. In the form shown, the worm wheel-'11... on the:clutch shaft 45 of the transmitter has thirteen teeth and that'upon thereceiver clutch shaft 102 has twelve teeth. Normallythe clutch shaft 102is held in its forward position by the engagement of a flat end of I theeccentric cam lug 75 thereon with the roller 7 3 on the trip 114 andwith the driven clutch member inengagement with the brake 108 and withthe actuating spring 69 com 7 pressed. v v i a small bracket Thereceiver magnet 3 has two spools in the form shown, and depends from'hori zontal. support 117 projecting mama-r61 2} I from bracket 46. Itis provided with alight armature 118 connectedby pivot screws 119 I tocars formed upon the outer .end' of the 29 support 117. A light spring120 extends be tween the armature and an adjusting screw 121 and tendstohold the armature in one. gagement with the lower end. of an adjust...able stop screw 122. Screws 121 and are threaded through two rearwa'rdlypro jecting lugs 123011 the upper portion oi-flm support or yoke 101.The magnet 3 is pre erably arranged in a closed circuit and normallyholds its armature 118 down against "9 Y the tension of the spring 120,but, if desired, .this arrangement could be reversed and the magnetarranged in a-normally open circuit. Preferably the magnet is connectedin circuit with the transmitter contacts 37 and 38 of the apparatus, sothat it responds to the operation thereof as well as to the operation oftransmitter contacts located at the distant station or stations.

-- lever.

. The outer pivot pin 119 of the armature also forms the pivot for onemember, 124, of the toggle latch which controls the trip lever 114. Theether member 125 of the latch is in the form of a double link and isconnected by a pivot 126 to the upper end of the trip The two togglemembers are connected by arule joint adapted to be fixed in onedirection only (upwardly in the form shown), and comprising a pivot 127and a stop 128 formed on the member 125 and adapted to be engaged by theextended forward end of the toggle member 124. A light spr' 129,connected to the outer end of the pivot in 127. and to the stud of theroller ont e trip lever, normally holds the forward end of toggle member124 in engagement with the stop-128. In this position the pivots of thetoggle members lie in a line extending. at right angles to the triplever,

so that pressure exerted on the roller 7 3 byv the cam lug cannot tripthe latch. The

tri lever is thus locked in normal position to old the receiver clutchopen but a slight upward pressure on the members of the toggle latchwill throw their pivots out of ah%1ment so that they can be flexed asshown in ig 15 and permit the rearward shift of clutch shaft 102 by itsspring 69 to thereby move the driven clutchmember 106 out of engagementwith the brake 108 and into engagement with the drivin member l07. Thisrelease of the tog le late is effected by a lug 130 that exten slaterally from the armature 118 beneath the toggle member 124.

To permit the easy flexing of the toggle, the

forward end of member 124 and the face of the stop 128 engaged therebya're beveled as shown. A

The toggle latch is thus tripped when magnet 3 is deenergized by thestarting pulse or interval of each signal and the receiver clutch isclosed to thereby effect the rotation of the main shaft 98. When themagnet is energlzed to pull down its armature,-

sprin 129 will restore the toggle members to thelr aligned, lockingposition. This will occur during the spacing intervals betweensifgnals,so that at the end of the revolution 0 the receiver shafts 98 and 102the eccenj tric cam lug 75 on the latter will ride up on the roller 73of'the trip 114 to open the receiver clutch, shift the driven memberthereof into engagement with the brake, and arrest the receiver shafts98 and 102 and parts operated ithereby. As inthe case of the transmitterclutch, this opening movement is aided by the momentum of the movingparts. The brakes'of the two clutches can be so adjusted that theextent-of movement required of the clutch shafts is slight, and theclutch and brake members actto start and stop the actuated parts quicklyand with certainty. 1 To aid in effecting quick starting of the receiverclutch, theco-operating cone surfaces of the driven member and brake areinclined at a somewhat sharper angle than the engaging faces of thedrivingand driven clutch members. The end thrust on nal and co-operateswith meansrotated by the shaft to position a set of five selectors. Thelatter, in the form shown, comprise pins or plungers 131 slidablymounted in the ends of a horizontal yoke orsupport 132 and arranged inan arc concentric with shaft 98. Support 132 is fixed to the upper endof the rear bracket, extends forwardly therefrom, and has two downwardlyprojecting arms 133 thatengage the brace rods 97. The selector pins orplungers 131 are normally held in rearward or retracted position and areshifted'forwardly by a setof levers 134 which, in turn, areoperated by'a series of pins 135. The latterare mounted in bearlngs 136 on bracket46,and are arranged in a circle. concentric with shaft 98. The levers134 are centrally pivoted in the forked rear ends of studs 137 fixed tothe bracket 46. The levers are of different lengths and are so shapedthat, as most clearly shown in Fig.

8, the upper and'lower ends thereof, respec-.

tively, engage the rear ends of'the selecting pins and heads on the rearends of the ac .tuating pins 135. Separate leaf springs 138,

fixed'to the'support 132, extend forwardly over the selecting plungersand are provided with depending V-shaped forward'ends' that engagesmall, circular, bevel-edged lugs fixed to the plungers. When the lugsare in the rear of the V-ends of the sprlngs, the

latter hold the plungers, the levers 134 and pins 135 innormal retractedposition with ihe heads of the pins engaging the bearings 36. i Theforward ends of the pins 135 extend through notches 141 formed in a camring 142 thatis secured to the front face of the bracket about theopening therein through which shaft 98 extends. The cam ring isconcentric with the shaft and the latter carries-aspring-actuatedshuttle 143 having a roller 144 thereon arranged to engage the cam. Theshuttle is cylindrical and is mounted on a sleeve 145 fixed to the shaftby set screws 146 extending through a flange posed between the sleeveand shuttle.

147 thereon. The roller 144 is journaled on an arm of the shuttleand, asstated, engages the face of the cam ring. To avoid sliding friction, theengaging faces of the roller and cam are conical. A horizontal pin 148,fixed to the shuttle arm, extends through an opening in the flange 147and compels the rotation of the shuttle with the shaft, but permits itsaxial movement on the sleeve. Preferably, anti-friction rollersareinterA'- spring 149 on pin 148 presses the shuttle rearwardly andholds the roller in engagement with the cam, and also serves to folcethe roller into the cam notches 141 against the pins 135 -to therebyshift the levers 134 and the selecting pins or plungers 131. This thenotch far enou h to actuate the correspring also takes up any end playof the shaft 98 and holds it in position, with a shoulder 150 thereonengaging the shaft bearing 99.

The shuttle. has a flange 151 on its near end which co-operates with afinger 152 projecting forwardly from the armature 118 and se curedthereto by screws 152'. These screws extend through short slots in thefinger 1.52, so that the position of the latter can be adjusted. As thecircuit of magnet 3 is opened and closed, the shift of its armaturemoves the rear end of the finger 152 into and out the roller passesthrough one of the notches the rearward shift of the shuttle, effectedby the spring 149, will be arrested by the engagement of the finger withthe shuttle flange 151 and the roller will not drop into sponding pin135. f, however, the magnet is 'energ1zed at this time, its armaturewill be held down and the rearward shift of the shuttle and rollercompleted "to thereby engage and shift the pin and move thecorresponding selecting plunger 131 forward. When any selectin thebeveled-edge lug 140 thereon passes beyond the V-end 139 of its springand is thereby held in shifted position.

The shaft 98 and the selector-actuating shuttle thereon rotate at such arate and the notches 141 of the cam ring are so uniformly and angularlyspaced that the roller 144 passes through the notches in synchronislnwith the five selecting impulses or unitsof the transmitted signals, andso shifts the selecting plungers forwardly or leaves them innormalretracted position, as the circuit ters of the transmitter camsections' In plunger is thus shifted,

of magnet 3 is, either closed or opened by the corresponding selectingimpulses of each signal.

-The shuttle is so positioned on the shaft that the roller thereonregisters with or passes through notches 141 of the cam ring 142 duringthe mid-portions of the selecting intervals or units of the transmittedsignals, as indicated in Fig. 16, so that the magnet changes theposition of its armature while the shuttle roller is on the highportions of thecam. And since the high cam portions then hold the rearend of the shuttle spaced slightly in front of the path of movement ofthe forward end of the finger 152, the magnet can shift its armaturefreely, Moreover, since the high cam portions the cam sections 43 thatimpart the selecting intervals of the signals to the line. To inwith theproper operation of the receiver. member during the spaci interval atthe end of each signal, it isriven, .as stated, slightly faster than therota transmitter member and, in order that t e rotary receiver actuatingmember shall pass through its operating positions during the midportions of the signal intervals, the notches of the receiver cam are notonly relatively shorter than the corresponding operatingz portions ofthe transmitter cam, but are angularly spaced farther apart than thecenother words, the selecting units of the re-, ceiver cam arerelatively longer than those of the transmitter cam to compensate forthe difleren ce in speed, and the portion of the"- receiver cam thatcorrespond to the starting and spacing intervals are relatively shorter.

The relative shortening of the starting and stopping portions of thereceiver cam is indicated in Fig. 16, but otherwise no at tempt ismadeito indicate this relative difference in s eed.

The position of the shuttle and of the roller 144 thereon canbe adjustedin circumferential direction on shaft 98 by means of the setsc'rews 146,which, as shown in Fig. 12, engage an annular. groove in the shaft. Theshuttle is thus set 'to' take care of the lag in the startin operationof the receiver clutdh, and whic as described, is effected by-thestarting impulse of each sig- 'terval of the signal and the startingtion of the cam represents, the lag 1D the nal. The shuttle will be soset that its roller i wiil pass through the first notch of the cam atthemid-port1on of the first selecting impulse or interval. The relationof the portions of this cam to the intervals or units of the signals isindicated in' Fig. 16. The difference in length between the starting111- startingoperation of the receiver clutch. As noted the high portionof the cam between the fifth and first notches thereof, and whichcorresponds to the startin pulses and separating intervals between t esignals, is relatively shorter thanthe corresponding sections of thetransmitter so that the entire receiver cam is preferably about 6 unitsin length, The starting and stopping positions of the pin-actuatinroller are indicated in full and dotted lines in Fig. 16, but, ofcourse, these positions are coincident; as already-noted, the zeroposition of the roller can be adjusted to take care of the lag in theoperation of the starting clutch.

When two or more machines are connected 'or placed in communication, themotors are set to run at substantially the same speed,

but, as noted, the receivers are so geared to the motor shafts that theyrun slightly faster than the transmitters and are 1n-v variably arrestedduring thev spacing intervals between the signals and again started inexact'phase with the transmitted impulses by the initial starting pulseof the succeeding signal. 'In other words, any variation in phasebetween a receiver and the signals transmitted thereto from a.- distantstation is corrected at the intervals :between the signals, so thatthere can be considerable variation in the speeds of the motors atdifferent connected stations. Hence, although the timingof thetransmitters and receivers dur-' ing each signal period is determinedbythe rate of speed of thelocal motors, the means for adjusting thespeed of the motors at different connected stationsjdoes not requirefrequent attention. It shouldv also be noted that the transmitter andreceiver of each apparatusl are independently driven by the motor. Forthis reason, and since the operationof the transmitter switch isinitiated independently of the starting impulses, and

' imparts the starting intervals to the line i after it leaves or passesthrough its normal.

or zero position, the relation between the starting and selectingimpulses of the transmitted signals-is in no way afl'ected by the rationof the startin clutch, or ot erelectrically contr fied. start- 7ingmeans. on this account, the receiver need'not be frequently adjustedto take care,

of variations in the lag of startin ueens of transmitters located atdiflerent I 'stant sta- -tio ns.,- 'and tofwhich "the. receiver isconnected, Again, since the starting or correct-'- not have to magnet,

accuse 1n impulses accompany all transmitted signa no adjustment, of thereceiver is renoted, the receiver shuttle c iefly requires adjustment totake care of the lag in the op eration of its own" local starting means,and

this adjustment can be made when the machine is set u and, for the mostpart, .does 7 changed unless something affects the time of operation ofits starting clutch.

quired to take care of line la As already- While various recording meanscould be used, means similar to that shown in the United States patentto Baudot, No. 388,244,

dated August 21, 1888, is preferably em-- ployed. However, instead ofemploying continuously rotating combiner disks and typewheel,-as in theBaudot printer, these parts are connected to, and are preferably mountedI on, the intermittently rotating shaft 98. The combiner disks 153 and154,-having arflange 155 clamped between them, are mounted on a collar156 on shaft'98' in rear of the front bracket. One of the disks and theflange are preferably annular and are fixed to the rim portion of theother disk, the hub of which is secured to the collar 156, the lat- .terbeing fastened to the shaft by set screws 157. The'peripheries of thecombiner disks are' provided with raised portions and notches orrecesses, and are engaged by a set of five selecting fingers or feelers158. The latter have upper ends of inverted U-shape 'and are fixed to aset of short, horizontal,

pivot pins 159 that are rotatably and slidably mounted in a supportwhich is fixed to theupper portion of the front bracket and projectsrearwardly therefrom. This sup-' port comprises a member161. a I p Theupper portions of the selecting fingers have integral contact heads 162and the head of the left-hand finger is enga ed by ah'ead 163 formedupon a rearwarddyprojecting arm 164 of a lever 165. This lever isarranged in front of the. plate 160 and its rearwardly projecting arm164 is provided with a de' ndingportion 166, having lugs that are. xedto a pivotpin 167; whichis like the pivot pins 159 and similarlyImounted in the plates 160 and 161. A spring 168,

plate 160 and a' U-shaped' connected .toan adjusting sc'rew- 169 and tothe lever 165, forces the head 163 of the lever to the right .and holdsthe contact heads 162 in engagement with the-selecting fingers 158bearing on the peripheries of-the combiner disks 153 and 154. 1 i

The contact heads and the ivotpins of the lever 165 of the selecting ersare arranged in arcs concentric with t e shaft 98,

and the'pivot pins 159 of theselecting fingers are arranged, resctively, in alignment with the, selecting p ungers 131; In theirretracted positions the selecting fingers158 I rest upon the combiner 153, but they are 1 adapted to be shifted through a gap in the fla nge'155 by the plungers 131 and into position over the combiner disk 154, asshown in Fig. 12. A restoring cam 170 on the combiner disk 154 extendsthrough the gap of flange 155 and, near the end of the revolution ofshaft 98, engages and restores any of the selecting fingers 158' thathave been shifted.

The combiner disk 153 has a number of rearwardly projecting studs 171which carry a thin, sheet metal, stop flange 172. The latter is annularinform and is arranged to engage the lugs 140 on the selecting plungers131-and'arrest the forward movement there of when the latter areadvanced by the selector-actuating shuttle, as previously described. TheV-ends 139 of the springs 138, which engage the lugs 140 and hold theselecting plungers 131 in retracted position, also hold them, whenadvanced with the lugs, against the rear face of the stop flange 17 2.The latter is provided with a gap within which are arranged twooppositely-inclined cams 173 and 174, formed upon a U-shaped piece 175that is mounted on a block 176 on the rear face of the combiner disk153. The lugs '140 of the selecting plungers 131 are normally out of thepath of movement of these cams, but when the plungers are advanced, thecam 173, near the end portions of the revolution of shaft 98, willengage the lugs and further shift the plungers forward to thereby movethe corresponding selectingfingers 158 from engagement with the combinerdisk 153 through the ga in flange 155, and into engagement with disk154. Immediately after this operation cam 174 engages the lugs 140 ofthe shifted plungers and restores them completely to their retractedposition.

The restoring cam 170 for the selecting fingers 158 is arranged silghtlyin advance of the cams 173 and 174, as shown in Fig. 12, and these threecams act successively near the end portions of the revolution of shaft98 to restore the fingers 158 that have been shifted at the previousoperation, actuate the plungers 131 to again set the fingers,

thus transferring the received signal from one set of selectors to theother, and finally to restore the plungers in readiness to be positionedduring the succeeding operation andjn accordance with the variedselecting impulses of the next signal. The parts of the receiver areshown approaching their normal zero position in Figs. and 12, and inthis position in the other figures.

While as stated, the blank portions of the receiver cam which correspondtothestarting and spacing intervals of the signals are relativelyshorter than the corresponding portions of the rotary transmittermember, neverthele s, as is clear from an inspection of Fig. 13, theangular space between the last and first selector operating positions ofthe actuating shaft 98 as determined by the angular spacing of the pins135 is considerably greater than the other uniform spaces between thepins, so that ample opportunity is afforded for the adjustment of thestopped position of the selector actuating shuttle relative to itsoperating positions, and for the operation of the cams 170, 173 and 174by the movement of the shaft, before the eration.

A type-wheel 177 and a toothed wheel 17 8 for operating a printing armare mounted on the forward end of the shaft 98 and rotate therewith.Wheel 178 is arranged to engage a tooth 179 on the inner end of aprinting arm 180. The latter is pivoted on a stud 181 projectingforwardly from bracket 96, and a spring 182, connected at its outer endto an adjusting screw 183, tends to throw its inner end upwardly.Normally, however,

. first selector .setting of the succeeding opthe arm is held down by acatch 184 pivoted on the bracket 96 and engaging a lug 185 on the innerend of the arm. A' spring 186 connected to the catch holds it'in normalposition with its lower end in engagement with an adjustable sto screw187, and with a laterally projecting arm 188 on the catch engaging theleft-hand end of a trip 189. The latter is centrally pivoted on thebracket 96 and its right-hand end is connected to the end of the lever165 by a link 190 that is preferably formed of two adjustably connectedsections.

The paper tape on which the characters are printed passes over a fixedguide pin 191, thence over a guide pin 192 on the arm 180, around animpression roller on the end of the arm, and thence over a feed wheel194 that is journaled on stud 181. A springheld support 195, pivoted ona stud 195, carries a pressure roller 196 that holds the tape inengagement with the feed roller.

As stated, the selecting fingers 158 are set in accordance with thesignal that is received during each'revolution of the shaft 98. At thenext revolution of the-shaft the combiner disks rotate below the ends ofthe selecting fingers. As in the Baudot printer, the pressure of thehead 163 of the springactuated lever 165 against. the. contact heads 162of the selecting fingers 158 prevents any of the fingers from droppinginto recesses of the combiner disks until the latter have moved to sucha position that all five fingers can drop into recesses thereof. Whenthis occurs, the lever 165 is lowered and the continued movement of thedisks forces the selecting fingers upwardly and quickly lifts the lever165. The combiner disks are so notchedor recessed that this movement ofthe le er cc rs hen the character on the type-wheel, that correspondsto.the particular setting of the selecting fingers, is in positionopposite the impression roller 193.

The oscillation of the lever 165 thus effected first lifts and thenuickly throws down the left-hand end of t e trip 189, so that it strikesand releases the catch 184. The spring 182 then moves the arm 180 andenages its tooth 189 with the wheel .178 and the latter swings the arm onits pivot, presses the paper on the impression roller against the propercharacter on the typewheel, which at this instant is in print ingposition, and moves the arm to the position shown in dotted lines inFig. '10. The arm is arrested in this position, with its tooth 179disengaged from wheel 178 and IGVOllltlOIl of shaft 98 a roller 199, onthe with the impression roller out of contact with the type-wheel, bytheengagement of :1 lug 197 on-the arm with the lower end .of

' a pivoted restoring lever 198, which at this time engages stud 1 95.-At the end. of the rear face of wheel 178, engages the upper end of therestoring lever and the latter shifts ,the printing arm back throughblank spaces in the wheels 177 and .178 toit-s normal position inengagement with the catch184.

As in the Baudot' rinter, the shift .of the arm 180 effects the liatterspace feed of the paper tape through'the, medium of spring I pressedholding andfeeding. pawls 200 and mounted on a pivoted spring-held arm203.

200', pivoted, respectively, on the-arm and .on the bracket 96 andengaging a ratchet 201 fixed to the feed roller 194. A suitable inkingroller 202 for the type-wheel is A blank portion of the type-wheel isadapted .to be brought to printlng position in response to a spacingsignal. [Since the selectors are'set during one revolut on of thereceiver and the corresponding character printed at the next revolution,and since the receiver is arrested after each revolution; the spacingsignal must be transmitted to effect the printing of the last characterof I the messa e. Preferably, the type-wheel has two sets of tylpe andis shiftable relatively to the toothed w eel 178 which controls themovement of the printing 'arm 180., For this purpose the type-wheel andan arm 204 are fixed to the ends of a common hub 205, which is looselv I.mounted on the forward end of-the shaft it and the and is held in placethereon by a washer A spring-held catch 207, pivoted on wheel 178, has

two notches for en a in thebeveledend g g g of arm 204 to thereby holdpe-whe'el in either one of two ositions re ati'velyto ,the'toothedwheel. e oppo'site end offarm 204 e ages a shifter 208 centrally pivotedon-wheel-1 78 and having two projections 209 which, as

theshifter is ,opemted, alternately overlap t f he pa e bet een t e t tho th the selected shifting pins 135.

7 the magnet wheel, one or the other of which is adapted to be engagedby the end of the printing. arm 180. At points corresponding to thesetwo spaces of the toothed wheel, the typewheel is blank, so that, bysending suitable shifter signals, the printer arm can be actuatedtoengage the projections 209 of the shifter and thereby adjust theposition of the arm 204 and the type-wheel relatively to the toothedwheel 178 and bring either set of type into operation.

Modifications of the selector mechanism I are shown in Figs. 17 to 20,inclusive. In these forms the receiver magnets 210 are horizontallydisposed and the armatures 211 thereof are mounted on verticalspring-held levers 212. The armature lever, in the form shown in- Figs.17 and 18, has a fork 213 at its upper end and pins 214 thereon engagean annular groove of a shuttle 215 that is keyed to and is axiallyshiftable on the main shaft 98.. An arm 216 on the shuttle is providedat'its end with a bev eled cam 2'17- that is rotated by the shaft 98'past the forward ends of the selector shifting pins 135 and is movedinto and out of operative relation with the pinsas the circuit of themagnet is'opened and closed. 3 In the form shown in Figs. 19 and 20, thearmature lever has an "annular part or ring 218 which surrounds and isconcentric with the shaft 98'and isprovided with a set of five internalcam lugs 219'. A sleeve 220, fixed t0 the shaft, has a lug 221 thereon,to which an actuating arm 222 is centrally pivoted. The arm is providedwith inclined cam ends which co-operate, respectively, with the inclinedfaces of the cam lugs 219 and with the forward ends of the pins 135. Aspring 213 tends to hold the rear end of sleeve.- As the actuating armis rotated by the, shaft, the armature lever is shifted by the magnet'tomove the cam ring 218 thereon into and out of the path of movement ofthe forward end of the actuating arm 222: and its rear end is shifted bythe cam lugs 219 into and out of operative relation with lugs are, withthe being arranged slightly in advance ofthe corresponding pin.

In bothof the modified forms, as in the form previously described, thepins 135 and the corresponding selecting plungers 131 are shifted orremain in retracted positions as response to the varied selectingimpulses of eac 'signaL- In each of the forms, the rotary' movement ofthe selector actuating member, while initiated .by the selecting magnetin response to the starting condition of each signal, is effected underlocal control y t e mew-driv n r ce er sha o that The cam of course,spaced in accordance spacing of the pins 135, each lug circuit'is openedand closed in tor is effected and locally timed by the rotary movementof the main shaft, and the selecting magnet solely controls suchreciprocating movement. Also, in these forms,

- the arrangement is such that the selector setting operations areeffected without opposing the operation of the selecting magnet andwithout applying pressure upon the armature leverin a manner tendin todisturb its setting as determined by tie magnet. The improved receivermechanism is particularly applicable for use in connection with thestart and stop clutch mechanism, but certain features thereof could beemployed in a receiver in which other means is used for maintaining itsoperations in synchronism with the receivedvsignals.

The different arrangements of the circuit which can be employed areshown in Figs. 21, 22 and 23. In Fig. 21, three combined keyboardtransmitters and printing receivers at different stations areconnectedin series in a common line, the receiver magnets 3 beinginterposed directly inv the line circuit. In Fig. 2, line relays 225control local circuits for the receiver magnets. Obviously, these localcircuits could be normally closed as shown, or normall open. At onestation in Fig. 22, a modi ed transmitter, adapted for use with aperforated tape, is

provided with a set of five impulse selecting switches 226 and acollecting transmitter switch. The latter comprises a continuous ringcontact 227 and seven segments of equal length adapted to be connectedby a rotating brush 228. This brush takes the place of the rotaryactuating cam member in the transmitter already described, and, likethis cam member, is driven from the station motor through the medium ofthe transmitter start and stop clutch mechanism. After each signal andwhen its operation is arrested, the brush is in engagement with thesegment I. This segmentis connected directly to the line battery and thesegments 1, 2, 3, 4 and 5 are connected to the battery by the normallyclosed selecting switches 226, that are adapted to be variablycontrolled by a perforated tape or, if desired, by a keyboard such ,aspreviously shown and described. No connection is made to the segment S Iwhich imparts the starting impulses or intervals to the line. Theoperation of this transmitter is substantially similar to that of thetransmitter previously described, exceptthat when the tape is employedto control the set of impulse selecting members or switches 226 a magnet229 for shifting the switches, intermittently advancing the tape andtripping the clutch, is provided and its circuit is energized byasuitable switch operated by the transmitter shaft 44, upon which therotating transmitter brush 228 is closed when the transmitter brush isin engagement with the segment I. A manually operative switch 232 isinterposed in the circuit of the magnet to start and stop the operationof the transmitter.

Fig. 23 shows one of the terminal stations of a duplex line circuit. Thecontacts of a keyboard transmitter, the magnet of a printer, and atransmitting relay 233 are arranged in series in a local circuit. Theprinter in this circuit acts solely as a home recorder and the printerfor recording received messages is arranged in another local circuitcontrolled by the tongue of a polarized line relay 234. As usual, thetwo coils of this relay are connected, respectively, to

main and artificial lines and both coils are connected to the coils ofthe transmitting relay 233, the latter having front and back contactsconnected respectively to the unlike poles of a divided line battery.With this arrangement negative current will be normally imposed upon theline and signals, consisting of a positive starting pulse and fiveselecting pulses of one or the other polarity, will be imposed upon theline by the relay 233 under control of the transmitter switch contacts37 and 35. The transmitter and receiving and home recording printers canall be operated from a common motor through separate start. and stopclutches. .Other changes that. have been indicated tors movable at anangle to its rotary path to effect the operation of selectors, astartand stop clutch for initiating and arresting the rotary movement'ofsaid actuator at the beginning and end respectively of each sig nal, anda single magnet. responsive to the received signals for tripping saidclutch and variably controlling the angular movement of said actuator. p

2. In a receivin apparatus for selecting telegraphs, a set 0 selectors,a common selector actuator, a power drive for rotating said actuatorinto relation with said selectors in succession, said actuator beingmovable at an angle to the rotary path into position to

